/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.scxys.activiti.rest.service.api.identity;

import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.activiti.engine.ActivitiIllegalArgumentException;
import org.activiti.engine.IdentityService;
import org.activiti.engine.identity.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.scxys.activiti.rest.exception.ActivitiConflictException;
import com.scxys.activiti.rest.service.api.RestResponseFactory;

/**
 * @author Frederik Heremans
 */
@RestController
public class UserInfoCollectionResource extends BaseUserResource {

  @Autowired
  protected RestResponseFactory restResponseFactory;
  
  @Autowired
  protected IdentityService identityService;
  
  @RequestMapping(value="/identity/users/{userId}/info", method = RequestMethod.GET, produces = "application/json")
  public List<UserInfoResponse> getUserInfo(@PathVariable String userId, HttpServletRequest request) {
    User user = getUserFromRequest(userId);
    
    return restResponseFactory.createUserInfoKeysResponse(identityService.getUserInfoKeys(user.getId()), user.getId());
  }
  
  
  @RequestMapping(value="/identity/users/{userId}/info", method = RequestMethod.POST, produces = "application/json")
  public UserInfoResponse setUserInfo(@PathVariable String userId, @RequestBody UserInfoRequest userRequest, 
      HttpServletRequest request, HttpServletResponse response) {
    
    User user = getUserFromRequest(userId);
    
    if (userRequest.getKey() == null) {
      throw new ActivitiIllegalArgumentException("The key cannot be null.");
    }
    if (userRequest.getValue() == null) {
      throw new ActivitiIllegalArgumentException("The value cannot be null.");
    }
    
    String existingValue = identityService.getUserInfo(user.getId(), userRequest.getKey());
    if (existingValue != null) {
      throw new ActivitiConflictException("User info with key '" + userRequest.getKey() + "' already exists for this user.");
    }
    
    identityService.setUserInfo(user.getId(), userRequest.getKey(), userRequest.getValue());
    
    response.setStatus(HttpStatus.CREATED.value());
    return restResponseFactory.createUserInfoResponse(userRequest.getKey(), userRequest.getValue(), user.getId());
  }
}
